Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de2c2b580afff9a8f007770c80d9f38dda7ba6125e6b4d595add047ab34faa0b' 
  AND token = 'sWLT2iiYah7Lh46Ty7E4DEZN1GMXrw+4odkLxMg5eBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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