Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d99686fb028834ac4b1c7d0a7215a9b7163f7a9480eeb9068674aaeb5230c2' 
  AND token = 'dpIMbjL0MExEuoyBCZfZL99ymPDSy3oW7xJE8r0caoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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