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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0073566082f056e2d2e5754d9775f72ecc8699cd49575089c5aedc1d8dfdad52' 
  AND token = 'YujpN4Oyc3FjY6iC9o9NVFjIEio/Yua1S5hHhP0DrUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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