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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09bb14f3eaceb35943936fcc991dfe5e8f1e8d60adf8fdc8f71b67fd4ee1e35d' 
  AND token = 'WcL7uBMasOv4nfJaVSSybKOSzPW12f2xEnU5ck5mYD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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