Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff33f037a36b40bb65a500a8a0eab193f624c465527f07eae45141c88af5d3a7' 
  AND token = 'VyOAFD8O1qYUMlQp9zwy29LMT27igYpcAoOs3LPsP3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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