SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dab011c636588136d588931a0effafc45c0577a5aac44ef7d134c0a4fd9eb277' 
  AND token = 'Zjzx0j8Z+Ds4zCqP35DwmhhYXPGE/PiMM3TU0g97ccY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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