Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee186a50593a138ce3d38a32b18dd4d495fdbe569e6950ced77dcad80d1ccf56' 
  AND token = 'rQ7zu084IF/F3+3ZEouOySoUyVhUDtGA1y3yQ502nXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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