Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b2bb4b19985b987367f4820b619d99d513bf2e40de3deccda967a7eca48a728' 
  AND token = 'jJmPE3vjdTQ/uKfyRkz0GAkO1sL6pu4lK8yD97J9dkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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