Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f58e3afa53a63226ab67121bebcd7526323bbf696194c4e7100333bbedd925d1' 
  AND token = 'NDgwedmlCeoROgfDocZ5quV9gmicsFVowVXWuvv+vjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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