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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59e3b3b69944be5994f0890ecce03b0118e43f1d1d924d5d1804b86e40ebf500' 
  AND token = 'TzZv0UIXoGNbu5zI2BlMUHRDh0F9fbY0ZQvah6uP14c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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