Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54d076d1194a1181d248e5ce6388e746e3e4aa27bb0dd1d1554c28baae76eb0a' 
  AND token = 'SdVufCFzgT7kea53bwqh3f9L0b+Y/Tt+DTaUpbX70j8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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