Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6f8a68ce9ce951ed320fcbf2166cdf028ca7242aebe27f0b64d91009dd9c1b1' 
  AND token = 'IdGo0fgOt7BPDBWCmFPJXLDVJr/ouJ/cg8dQubyiXEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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