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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '401c048c5eed86a8be6fe0d32910840feab0c98a1ca298e7a56d18b885f5dad4' 
  AND token = '/q+JfThzmr58nxk9oXgIbQdmgoicctOuB+F/+s9KEfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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