Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2083786aeba0b56d0a592c17a826f9d4e7b303afd27deb6fe4d46419f79ff4b' 
  AND token = '4YTi2duQrRu1pPffWpm/Lndt6osLW05D5hTU9kzWDmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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