Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5ea3a7909bd58c7ae6a6783c9c98f62e7ad677cb601d8a1dffa164e193bd2451' 
  AND token = 'Ghp1f+cT76ysXTAcRhdexmUp+J4uuS9GzbfkfuV2vvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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