Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '775987d986411436d7295edf4424e0ec75c179dc2cd82eb0d5847d9ffbb9b29f' 
  AND token = 'b8IkW8UdjDxy8Gec2sAuiwPwJ5F6SaXPhjU1IDWWedU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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