Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4d3765d310fc21ac40803a47d0fe43574d79fd92dfea11833bf4507f35ef4eb' 
  AND token = 'TMbGlhZB6d2gHMMvlrTPGEQLMF0+64euyG+BuxdAJeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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