Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e4ef8da86b226b16299b5e0d6a4704d2496079751b3fe3c54fd3c4a0b6a8635' 
  AND token = 'Fr2w1YJGAs2kVs6XFeEB489DcehLGx2VUna7dXtgKP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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