Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29656b8be80e49e11e86927ccbefaeecf345907ea04d94265ae02989a4cc77b8' 
  AND token = 'DqRyN12vumYj3D/auh3CtHV4U19MopqpFsjU0ZvYfb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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