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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25e82260f349124a95a214da37e6e19bf2fc73590a85cb91ee2dd95f2987e5b8' 
  AND token = 'bZIvApYLcUNFoF36iGVzI5cM5d4KlWkiePmxziTEfLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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