Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fea43a9e4a1626467415cd0ae53f827a3f6316c18567ce048d65d8701113c529' 
  AND token = 'IwHcDuVR49pqbbOGlC9SdDiTbm8cexdWSe6zm7vvep0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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