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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf80b41e80987cbdee74a05e5f67a1507c81422e8c1f573c7658e1fe644ff1b0' 
  AND token = 'xeF68oLSeU4tlVVFwmxbazE0yDUJw99CzxiVLG9AXs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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