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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5aeaf299f7a5fd843aa11e085c7179b82aa4e27bc13911e8f4ac7ebaba8ed6d6' 
  AND token = 'grZoMfl42TiJCqr368BcNfeg8sqWrgCAQ1sGjEg91FY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}