Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9747ee1f503d1aa9cc0cfab81a7cd0de347e7cf9a2d3d1189d337d89a387d0ac' 
  AND token = 'P61T4M4UzxoWWQUMrEQRVG9euimAOpfZaFyhbbA0Das=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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