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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5028572d929e62347ff61eabe8f6c15c0222723bc7d865208422f67c08348e71' 
  AND token = 'DkMWBheFZ92iCX5m9nMrsFO1yMR4EqF4/Ca1OxFIr8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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