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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2aee8675c986409da3c2ec9bc82a1c9b5a6e42cd920e561f56de8df19c1bab6f' 
  AND token = 'RyQmfSDKPGxDGrEXtX+LEmW0iI/xwFn5x/FnjuGXX9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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