Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68dff7c1cddee5b4deff490dad53d401fd8a03bf64bc6597d510b717c9a630b0' 
  AND token = 'Dxanig+N3hsuUHkPSR53aF+ljQA7IkLezMhvmV9vTNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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