Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cc9fcda802f50379c5b62032d2834d9f4c8b90f975ac87cb33368bf8e8b0afe' 
  AND token = '+yQ0dlrbPa75w1EvgRMkwhBf7CF2pFkmWCpF7vFRrAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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