Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7315b48b362620b46df80ecd7bbef88eb724ad78dc482ab0a839d9cbd79ea98b' 
  AND token = 'Qkh669FgxxyHe1D9atYaCWi9OUjN04QLY3EPQJNATWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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