Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5a8a35de28e2bfde9364b3dd4439a8653ef4f8276f67a849158c3ebb7661fa9' 
  AND token = '4rDFqSQgtB0ap9M02XsJkeWupkA3U2CB54s1kOB0UR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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