Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e706059de62273ec9e5e8f79752b5d9e0e6c6abb6ed913564f8b52fc09694e89' 
  AND token = 'Ok7qUKX3/sJxDaH5WvX6vDn79Ag8ad/GxE3umuigI7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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