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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ba8f8a80ab5f4eeda6a542d80cd1cbf1c5010e7a36ac5352b71d40c58d6c40d' 
  AND token = '/d8bVTvpaUdZ+wHdhW4wQ0w96iiEI0KaanYWw0WJqyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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