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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ae8a04171dc33951a75eb7933c134c8cfccfcde796916d5f83b0e27cae1b80' 
  AND token = 'G02BAn0d/SRzg7oa54hgOvLHvhRYXeOGuD5IKTXiVmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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