Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74835b9ecd5d7fcebd2de00291e8bcb1c080cd8ff18cf9627275724cd7fc240a' 
  AND token = 's93HNbg5imrxFbFKU6G+jSOPvCXz0f9VCBFqtNkkZzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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