Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74395fbe944e893e8ab9ff83de0f30dd798125270fa1405eeb9ba26a06ca350c' 
  AND token = 'cMUlwTgSkDl/yXtzmC2nOlLZldM5FK6iQJZCRRQTmAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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