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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '915d7611fe77a8d7a887e51937dd24d6266d6d6b2c3ada9cd8271f099e0048f6' 
  AND token = 'vEuodDZkEoNKhuuqRoCf9pvTJEYda70L3da20aASn+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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