Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4ddd2e22746a86c38026c55d765506a563cb4dd232e0842b304e27e3da6a1f3' 
  AND token = 'cr4J8iTUdH9nLD0IzKggsz/oGOABWZM7+ZzQOfqT2HE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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