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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd56163a109a410d7ecbbee11a3eef926d3269d87573198b77c0bcffc242bc7ce' 
  AND token = 'XZE4BKAHaSbC/cpbs4CU1U3xsJz8/GTW5uxY47bBOX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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