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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22379b4306899e9a7a51695954fe9a8dc131032015985e7c5a1e774b7615429f' 
  AND token = '7j6yQI+DDmy3T5EwBI6yvZgH3yWyr33XPW0VGWuKDjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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