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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5f3cac0380c9345d7344f49f4f05c9210269d991e8e9a7274b5dd8f2dceacab0' 
  AND token = 'bWdCPK54yRX6KkgesmEnKtPCHnh4cgnmn83fiVph/nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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