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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01795b02f9839df8a8df5ed20a63f96caf72207fc0db2900ddce56ff8d713cf3' 
  AND token = '01YSnJFMMN/puwzVcI5W1J9zsTQEMXMMWdGIYOwrbRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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