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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dcd44a9e7f9c787fb70eceb1c0daf83170cc3162c37cb627e6426316dacf6ce' 
  AND token = 'LiVkUBjnxVWe1QARocON5In1GK3JcIiyBDAzXwj87FA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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