Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'eb4cfc4a96ece8c1d6b6335e8276a113d5955165af135179ecc2bae3bd5da740' 
  AND token = '5eCk3ygUuqXyz+6e/yQU7RnpT4woXjRezMOEqNEveHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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