Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a498ac3fad61faa271ddedfaa14d6afb70ff6f2fbee12b44bbca2eb86fbc04ec' 
  AND token = 'XJoxDoMb/tX2imwYwd3gMPKfaDSzLPk9FHg1o8SigUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}