SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007b1fec8393b4a940c20395a3daa95d8db5aa6d11fb03df5a1d9d10b8306281' 
  AND token = 'oHTekkzkI+TJqvprmuGnvHmYjY6VyUnkL4lVRKavJDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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