Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69e01cb3f1cf18b58728555e9276061c8dce3b4d122f5f2da097814d82453315' 
  AND token = 'PKTq9Tjd7Oa8N0MyT+2betrC+olcGXy21BAZxA+I87M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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