Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e464c9aa2cf3bf49b2fc56dc4cfeca1d6c0665ffce94aff6cdf1eb9d07374eb5' 
  AND token = '0TMCtaMBoDqacNMRq7jAOFInGyNh26qPgMBhJ5wu2pk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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