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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6113cf9719381158e0b3128cab3ef9e95f36acbe5986a46af89f0698a7e3e853' 
  AND token = 'qYRV/O7BFnXo6MGQFLBUldJWqML3eo5JHJSa9Evxpz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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