Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10ead1d7d16080bf1738aafab1e21721fbef331a718915705fa6b2c2ce48984a' 
  AND token = 'nm61pFmXifA5htYybNt6Y2G9gjvlGRgiqzGLafGhqlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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