Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b567da43c1d0f735ac3953096d61c2f5a65986a1336e1cadc360ed0d253facbe' 
  AND token = '/hFiMOX632ZNeVScsLLJt4ZQfanr8Y+9IOvkTdH8w7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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