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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80e9ab9d9fab01c57e30314f06d3c586e752acb83ed551a8d72358dc940d1474' 
  AND token = 'rp2WGMv/1xnraBBix2CAi4zKvNZuX8Ety3kXqV+uOao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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