Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46a9148fe943f43fc8c9cf7e72cea9cd0dea4a0924e85605b26731ce2a5c11d2' 
  AND token = 'Mcb3urnH3m/2FQu1vZI6niz2iAfnVRR+x4MUWgG6xEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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