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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1417a5ee81c86fa4f5d33c889f7bbf3b1115ab20f580194e2f49bc21b87ef8f5' 
  AND token = 'O1HuMz1GOU5MBRcX+/blSfUS+L8D6tUkIEuJhmjZWf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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