Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42b957378ea5345f8001d53324256753c2bd7a6a728e9f1818939201a25006d0' 
  AND token = 'ESyTHAICC3tnHegqySPKRPB1HIqqbxVa9kpifFB6uaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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