Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48c875f75fef7e68480852280354be5533323b0579d1ec05317edd406a2850c6' 
  AND token = 'l5euzwT81vSkzbghfUvtQocUWNs3YypazIi/t53/8SU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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