Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19baad9918a6912009571853355e03d0ec52f6d5ee57c9afdecff84757209c08' 
  AND token = '5WnmfjWI2aNi8tLj1Wsy9R4ksLjgsEvxFMBES3Xrf7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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