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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '844457be28d11a4b4e646c67152ca47bd1df14eab27c329789bb9037545c9903' 
  AND token = 'h/iDhaqfc3z5CQo9Ymo2a88TniCXg7Dnz8bcfeXTOyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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