Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de2650b3588b7e6a9d86b58754339a7d5ca28ae5cac77cdb41e9f985d50fb3f3' 
  AND token = 'DFAR19O/TC+j6qt9zkCqEPD7VdQlfW/dReROzhII8Mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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