Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc10c47d999703cf96528e12dcb0e5391c2c38830d51d737a29fe96284b5c7a2' 
  AND token = 'wHhxbSFuB7ld9TOsnOAVztJhpDmHXU9eh91Mxvc2ZBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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