Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee40408f66cbefed528fad9ea37166de8800985a251eb437af62c2c833fa96f6' 
  AND token = 'hztU8wkaMAGIqSJWJkICbfFz5tkTr52FxN8tCv8yAuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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