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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8a4a24355ce477dd48539343c41c55d1c0587eeb1596ce0922459491a1d9450' 
  AND token = 't/BdRpyeslKL4Zrl7ybx0GQGwyAxc/7e3hUUXouqThU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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