Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b05990e93fcf6f8f7050c1929a6dddbfc603e6fcf6e5112231f3c79c0a32b79' 
  AND token = 'i9D4icuwrvo0PRdNFXEd8LJ3bGWZA+nwBOHdnqguwFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}