Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a73221bedc504c69e7b9e7cbce674bca3d8145a5f33ff4f1a8514450230d97ea' 
  AND token = 'vgORmTAukthvtn/J06TI8hsV4d7r35mbdSSce7HiJig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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