Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb047a76203a612e9db91ccf81adde238a5578820670b3602e46dbe60e974230' 
  AND token = 'i0b9z8N2d3FAW6vGxwvbq9rbBYeISlUhQxdrynMkFYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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