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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05eb31c63c14d8a2d26a77e58352407ad7f6be91ab9aab1b58dc1d7eb0b40d78' 
  AND token = 'G3PrezVfpf1K3bYeGxUDch9P1hOWMkfy7U1gl1jbbmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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