Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dec707fbec05c2eff3b45e0f6153a2a8ff6d07eed765d0cd21ae4cc9327eaa18' 
  AND token = '+h/sBoBA5ftsrM8OtdT6ER0x09BMMzducW8D6Bgxwik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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