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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d191ee082b9eaec7a99362f58ff8c408ee3705dc80fe19b0463e1726599747e' 
  AND token = 'n52BE2i6QXuDKS7kp2ZuobGyZunJoP94NPk9q44A69E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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