SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '87a4c3be99c972b31cd267742591a53768d068abf7b1f9c91dd2c0e27dd291c2' 
  AND token = 'enaBRvFxo3XjzkuB9NnvgsaJqg4jHpmTIx8GZ+TGTk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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