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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd97c0b2381cd1458c1383d498e3a423ca0b0d8c0b3e7df94390a8986deaf8555' 
  AND token = 'YI8l0TYWz8YkTDgVbbugl1Zcsq2mDXd9GdsbBlavmN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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