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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0596171070e016f1dae738d399aa95f6efb51e4901900849f079475a9dc60748' 
  AND token = 'BZfmWoJh09yxzFHWaxHGwRh2J/+nj+g3TdTgyNqG16E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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